Custom Manufacturing
Custom CNC Machining Services for Metal and Plastic Parts
Formexi provides drawing-based CNC machining for custom metal and engineering plastic parts. We review the geometry, material, quantity, tolerances, finish and inspection requirements before confirming the machining route, quotation and lead time.
Machining Processes Selected Around the Part
CNC Milling
For housings, plates, brackets, manifolds, fixtures and multi-face parts with pockets, holes and controlled surfaces.
CNC Turning
For shafts, pins, bushings, sleeves, fittings and rotational components with internal or external features.
Multi-Axis Machining
For angled features, compound contours and feature relationships that benefit from fewer setups.
Special and Secondary Processes
EDM, grinding, deburring, finishing, marking and assembly are coordinated when the approved routing requires them.
Project Stages We Support
| Stage | Buyer objective | Manufacturing focus |
|---|---|---|
| Prototype | Fit, function and design validation | Fast engineering feedback and revision control |
| Low volume | Pilot build or bridge production | Repeatable setup and defined inspection |
| Repeat production | Stable replenishment | Approved revision, retained process records and capacity planning |
Materials and Finishes
Common projects use aluminum, stainless steel, carbon and alloy steel, copper alloys and engineering plastics. Titanium, magnesium, nickel alloys and specialty polymers require material and process review. Finishing may include as-machined, anodizing, passivation, plating, coating, polishing, marking and heat treatment through verified in-house or partner capacity.
Tolerance and Surface Requirements
Tolerance and surface requirements are reviewed by feature, material, geometry, datum strategy and inspection method. Mark critical dimensions, GD&T and roughness on the 2D drawing; the quotation will state the requirements Formexi can accept for that part.
What We Need for an Accurate Quote
- 3D CAD model and current 2D drawing
- Material and grade, or permission to recommend one
- Prototype and production quantities
- Critical tolerances, datums, threads and roughness
- Surface treatment and cosmetic zones
- Inspection reports and material documentation
- Delivery destination and required date
Quality Planned Before Production
Drawing review, material verification, first-piece checks, in-process inspection and final release are defined according to project risk. Full-dimensional, CMM, FAI, MTC and other documents must be requested before production so the correct evidence can be generated.
Standards and Regulatory Sources Used on This Page
For Custom CNC Machining Services for Metal and Plastic Parts, these primary sources define the scope of cited standards or regulations. They do not prove Formexi certification, a customer approval or project compliance; those require current, scope-matched records.
Engineering Review Before Quotation
We compare part geometry, feature access, datums, workholding, material, quantity, finish and inspection requirements before confirming milling, turning, multi-axis machining or a combined route.
For engineering plastics, we also review the exact grade, filler, conditioning state, wall support and measurement conditions because these factors can affect dimensional stability.
Can Formexi Machine Your Part?
Send the model and drawing. We will confirm process, manufacturability, documentation, price and lead time from the actual requirements.